Chotenthetsera chosungiramo zinthu zozizira ndi chosinthira kutentha chomwe chimalola choziziritsira chamadzimadzi chotentha pang'ono kusinthana mphamvu ya kutentha ndi chosungira chomwe chimafuna kuziziritsa.

Evaporator imapangidwa ndi ma coil amodzi kapena angapo: pamene firiji yamadzi otentha kwambiri ikalowa mu evaporator coil kuti iyende. Khoma la chubu litakoka kutentha kwa sing'anga (mpweya kapena madzi) mozungulira coil, madzi otentha kwambiri amasanduka mpweya (evaporates), kotero kuti kutentha kwa sing'anga mozungulira coil kumachepetsedwa kapena kusungidwa pa kutentha kochepa, motero kukwaniritsa cholinga cha firiji. Chifukwa cha izi, evaporator coil iyenera kuyikidwa mu sing'anga yomwe imafuna kuziziritsidwa. Evaporator ya malo osungiramo ozizira imayikidwa mu firiji ndi mufiriji; evaporator ya air conditioner ya chipinda imayikidwa mkati mwa khoma la chipinda chozizira. Ndipo monga air cooler, evaporator coil ya water cooler yomwe imapanga madzi ochepa (otchedwa madzi ozizira mu engineering) imayikidwa mu bokosi la chipolopolo komwe madzi ozizira amamera.